GUIDE
Hormonal changes, increased blood volume, dehydration, and stress commonly cause headaches during pregnancy — especially in the first and third trimesters.
While most pregnancy headaches are harmless tension headaches, certain types — particularly in the second half of pregnancy — can signal preeclampsia. Knowing the difference helps you treat safely and seek care when needed.
Be prepared from day one
Pregnancy headaches range from mild, dull pressure across the forehead (tension headaches) to throbbing pain on one side (migraines) to sinus pressure around the eyes and cheeks. The most common type during pregnancy is the tension headache — a band-like pressure around the head that can last from 30 minutes to several hours.
In the first trimester, headaches are frequently caused by the dramatic surge in hormones, increased blood volume, caffeine withdrawal if you have cut back, dehydration from morning sickness, and the stress and sleep disruption that come with early pregnancy. These headaches are usually harmless and respond well to rest, hydration, and acetaminophen.
In the third trimester, headaches deserve closer attention. While many are still caused by tension, fatigue, and posture changes, a severe headache after 20 weeks — especially one accompanied by swelling, vision changes, or upper abdominal pain — can be a symptom of preeclampsia, a serious condition that requires prompt medical care.
Headaches are most common in the first trimester, when hormonal changes are most dramatic, and in the third trimester, when physical strain, poor sleep, and increased blood volume take a toll. Many people get a reprieve during the second trimester when hormone levels stabilize.
If you had migraines before pregnancy, there is good news: about 60 to 70 percent of migraine sufferers find that their migraines improve during the second and third trimesters. The stable, high estrogen levels of later pregnancy seem to have a protective effect. However, migraines that begin or worsen during pregnancy — especially after week 20 — should be discussed with your provider.
Caffeine withdrawal headaches are a very common first-trimester experience if you reduced your coffee intake upon learning you were pregnant. They typically resolve within a week or two. Note that up to 200 mg of caffeine per day is considered safe during pregnancy, so you may not need to eliminate it entirely.
The key to managing pregnancy headaches is knowing what is safe to take and pairing medication with lifestyle strategies. The most important rule: avoid ibuprofen and aspirin during pregnancy unless specifically prescribed by your provider.
Acetaminophen is the safest over-the-counter pain reliever during pregnancy. Take the lowest effective dose — typically 500 to 1000 mg — and do not exceed 3000 mg per day. Avoid combination products that contain caffeine or other active ingredients without checking with your provider first.
Dehydration is one of the most common and easily fixable causes of pregnancy headaches. Aim for 8 to 12 glasses of water per day. If you have been dealing with morning sickness and not drinking enough, headaches are a common result. Try sipping water consistently throughout the day rather than drinking large amounts at once.
A cold washcloth or ice pack wrapped in a towel applied to the forehead, temples, or back of the neck for 15 to 20 minutes can reduce headache pain. Cold constricts blood vessels and can provide relief especially for migraine-type headaches. Alternating with a warm compress on the neck can help with tension headaches.
If you can, lie down in a dark, quiet room for 20 to 30 minutes. Close your eyes and practice slow, deep breathing. This is particularly effective for migraines and light-sensitive headaches. Even brief rest can reduce headache severity significantly.
Skipping meals causes blood sugar drops that trigger headaches. Eat small meals every 2 to 3 hours and always combine protein with carbohydrates for sustained energy. Carry snacks like nuts, cheese, or granola bars so you are never caught without food for too long.
Tension headaches often originate from tight muscles in the neck and shoulders — a common problem as posture changes during pregnancy. Gentle neck rolls, shoulder shrugs, and stretching the upper back can relieve muscle tension that contributes to headaches.
These symptoms can occasionally signal something that needs medical attention. When in doubt, call.
Most pregnancy headaches are ordinary tension headaches that respond to hydration, rest, and acetaminophen. If you suffered from migraines before pregnancy, you may find they actually improve significantly during the second and third trimesters.
The key is staying ahead of triggers: eat regularly, drink enough water, get adequate sleep, and manage stress. If headaches are frequent or severe, your provider can help you find a management plan that is safe for pregnancy.
You may also find relief by addressing related symptoms: pregnancy fatigue and insomnia both contribute to headaches, and morning sickness can cause dehydration that triggers them. For mood changes that accompany frequent headaches, check out our guide on pregnancy mood swings.
This guide is for informational purposes only and is not a substitute for professional medical advice. Always consult your healthcare provider with any questions about your pregnancy.
